分解率

The results show that the decalescence of catalyst bed affects the process of hydrogen peroxide catalytic decomposition greatly. If the catalyst bed is preheated or made up of materials with low thermal conductivity, that influence can be depressed. At the same time, the response characteristic of catalyst bed and the efficiency of catalytic decomposition can be improved. The low frequency pressure instability of catalyst bed occurs because of the coupling of catalytic decomposition and supplying. The decomposition plane pushes all the way through the catalyst bed during pressure oscillations, causing unreacted liquid hydrogen peroxide to be exhausted from the bed and leading to the appearance of liquid hydrogen peroxide channeling. Consequently, how to prevent or at least limit this channeling is the key to eliminate the pressure instability of catalyst bed. It was found that adding clapboard to the catalyst bed can depress the pressure instability efficiently.

结果表明催化剂床及催化剂的吸热对过氧化氢分解过程影响很大，对催化剂床进行预热或采用热导率低的材料制造催化剂床等措施，可以降低催化剂床壁面吸热对催化分解过程的影响，提高催化剂床的响应特性和催化分解效率；催化剂床的低频不稳定是催化分解过程与供应系统耦合产生的，催化剂床气体界面的波动过程中，液体过氧化氢穿透催化剂床形成过氧化氢液体通道，过氧化氢液体通道的产生和扩大是催化剂床不稳定的主要原因，也是消除催化剂床不稳定的关键，试验中在催化剂床内加入分流板成功地抑制了催化剂床的低频不稳定。

Chapter six presents such new concepts as margin utility contribution force, profit-risk exchange rate, state-expectation-variance utility function, long-term expectation-variance utility curve and optimal portfolio expansion curve. The state-expectation-variance analytical method is developed from the expectation-variance analytical method. The changing rate of profit-risk exchange rate to state variable is used to define and distinguish the decreasing, constant and increasing relative risk aversion. A decomposition formula about the margin contribution force of holding wealth to state-expectation-variance utility function is displayed. The decomposition formula demonstrates that the contribution force of investors' holding wealth to their utility is composed of the pure contribution force of holding wealth and the investment contribution force bronght about through investment portfolio.

第六章提出了边际效用贡献力、收益—风险替换率、状态—期望—方差效用函数、长期期望—方差效用曲线、最优证券组合扩展线等新概念；把期望—方差分析方法发展成状态—期望—方差分析方法；用收益—风险替换率对状态变量ω的变化率来定义和区分递减、定常、递增相对风险厌恶；获得了持有财富对状态—期望—方差效用函数的边际贡献力的分解式，该分解公式表明投资者的持有财富对他的效用的贡献力由持有财富本身的纯贡献力和持有财富通过投资证券组合所产生的投资贡献力所组成。

The first step ranges from 250 to 380 ℃ with a weight loss of about 3%, resulting from the denaturalization and decomposition of organic matter in the powder;and the second step from 600 to 780℃ with a weight loss of about ...

第一阶段在 2 5 0～380℃，失重率约 3 %，此为有机质变性与分解阶段；第二阶段在 6 0 0～ 780℃，失重率约为 40 %，为碳酸钙的分解阶段。

The mass loss patterns of four type litters fitted exponential model, and the decomposition rate could be well predicted by their lignin/N ratio.

结果表明：与对照相比，降水量减少条件下，蒙古栎叶凋落物的初始N、P、K浓度显著升高，初始木质素浓度显著降低，凋落物分解速率大，N、P、K矿化率高，N和P固持时间缩短；降水量增加情况下，其凋落物初始N浓度显著降低、木质素浓度显著升高，N、P、K矿化率低，N和P固持时间延长。4种类型叶片凋落物的质量损失过程均符合指数降解模型，分解速率可以由凋落物木质素／N来预测。

The paper studies the distribution characteristics and determinants of job vacancies. The parameter estimation is based on the two-stage Tobit procedure. The main statistical results are as follows: There is a positive correlation between the hiring scale and job vacancy incidence, while there is a negative correlation between the qualification vacancy rate and the hiring scale. The higher the labor turnover rate in units, the higher the job vacancy incidences and the vacancy rates are. The 98.39% of institutions with prospects have labor needs, and 39.53% of units declining say they will hire new staff. After decomposing the Theil Index which reflects the gaps among vacancy rates, the differences among vacancy rates of different units are mainly from the inner causes of various groups, and the intergroup reasons are not main ones.

本文利用两阶段Tobit模型对国内的职位空缺统计数据进行了估计，发现：用人机构的雇佣规模与职位空缺发生率正相关，而职位空缺率则与机构的雇佣规模呈现负相关的关系；机构员工流动率越高，职位空缺发生率以及职位空缺率越高；在景气指数为"看涨"的机构中98.39%表示存在用人需求，而景气指数为"看跌"的机构里只有39.53%的机构表示会招募新员工；在对反映职位空缺率差距水平的泰尔指数分解后发现机构职位空缺率之间的不同主要是由于各类分组的组内原因导致的，而组间的原因并不是主要的。

The paper studies the distribution characteristics and determinants of job vacancies. The parameter estimation is based on the two-stage Tobit procedure. The main statistical results are as follows: There is a positive correlation between the hiring scale and job vacancy incidence, while thereis a negative correlation between the qualification vacancy rate and the hiring scale. The higher the labor turnover rate in units, the higher the job vacancy incidences and the vacancy rates are. The 98.39% of institutions with prospects have labor needs, and 39.53% of units declining say they will hirenew staff. After decomposing the Theil Index which reflects the gaps among vacancy rates, the differences among vacancy rates of different units are mainly from the inner causes of various groups, and the intergroup reasons are not main ones.

本文利用两阶段Tobit模型对国内的职位空缺统计数据进行了估计，发现：用人机构的雇佣规模与职位空缺发生率正相关，而职位空缺率则与机构的雇佣规模呈现负相关的关系；机构员工流动率越高，职位空缺发生率以及职位空缺率越高；在景气指数为"看涨"的机构中98.39%表示存在用人需求，而景气指数为"看跌"的机构里只有39.53%的机构表示会招募新员工；在对反映职位空缺率差距水平的泰尔指数分解后发现机构职位空缺率之间的不同主要是由于各类分组的组内原因导致的，而组间的原因并不是主要的。

The results showed that at the same concentrations, the total amount of test PAHs adsorbed by the K. candel and A. marina leaf litters had no significant difference, in spite of their decomposition status. The adsorbed amount of the PAHs tended to increase with their increasing concentrations. The litters had a higher adsorption rate of or exhibited selective adsorption to phenathrene and chrysene when the PAHs concentrations were lower, and had a higher adsorption rate of benzo perylene when the PAHs concentrations were higher.

结果显示：在同等PAHs浓度下，秋茄和白骨壤落叶碎屑对4种PAHs的吸附总量相近，树种间或分解状态间的吸附差异不显著；随着PAHs浓度的增加，2种红树植物落叶碎屑对4种PAHs的吸附率均呈现逐渐增加的趋势；PAHs浓度较低时，落叶碎屑对和菲有较高的吸附率或选择性吸附，PAHs浓度较高时，落叶碎屑对苯并芘吸附率提高。

There are three effects that may be important in producing this trend. First, lowtemperature oxidation preferentially affects the finer single-domain magnetites responsible for the Hopkinson peak, which is therefore suppressed in the more oxidized loams. Second, the possible production of uniaxial magnetite with shape anisotropy can also lead to a relatively muted Hopkinson peak. There is, additionally, a third alternative, and the one preferred here, that the natural alteration processes involved in pedogenic susceptibility enhancement have probably depleted the supply of ironbearing precursor phases, so that less new magnetite is formed on heating.

产生这种特殊热磁性质的可能原因如下：第一，成土过程中的低温氧化作用减弱了磁铁矿的Hopkinson效应；第二，可能是成土过程中生成的一向延长的针状磁铁矿颗粒表现出较弱的Hopkinson效应；第三，随着成土作用增强，现代黄土、黑垆土中的硅酸盐、粘土矿物因受土壤化作用分解而越来越少，加热过程中分解产生的磁铁矿造成的磁化率增强相对于其初始磁化率也就越来越小，从而产生越来越弱的Hopkinson/alteration峰，本文认为这是最主要的原因。

The effects of a nonionic surfactant on the seeded precipitation rate of sodium aluminate solution, the particle size and morphology of the products were studied.

采用对比实验法研究非离子型表面活性剂对铝酸钠溶液晶种分解率及其产品粒度和形貌的影响。

The principle of an optical microscope is quite simple; however, the resolving power of an optical microscope is limited by the wavelength of the light employed, being greater when the light source is shorter wavelength.

显微镜的工作原理很简单，然而，一个光学显微镜的分辨率受到采光波长的限制，光源的波长越短分解率越高。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。